Wheat plant model for dry climate conditions according to the yield components and some morphophysiological indices
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Author: Blagoy Andonov
In 2006-2008 26 wheat varieties were tested, created at IPGR Sadovo during the period 1948-2006 as well as the Bezostaya1 variety. Biometric measurements were made on some elements of productivity – number of productive tillers, harvest index, plant height, above-ground dry mass, vegetation period, number of grains in wheat ear, mass of grain in wheat ear, weight of grain per 1m2 area, number of stem wheat-ears per 1 m2 area, some morpho-physiological indices – flag leaf width, mass of 1 leaf, loss of leaf mass per 1 plant, loss of leaf area per 1 plant, measured in two phases of the wheat plant development. Detailed agro-meteorological statistics about the years of study is shown in our previous publication. The data of the measurements were mathematically processed by a computer program SPSS 9.0 for Windows. A regression equation was derived, explaining the quantitative modification of the grain yield per unit area in a “unit” change of any of the studied indices. The obtained equation of the theoretical regression model is as follows: Y=955,79+117,10*x1+443,70*x2-1,49*x3-4,69*x4+0,0064*x5+2,27*x6+93,91*x7+181,05*x8-0,20*x9+49,52*x10-2883,52*x11- 8,55*x12+5,39*x13 As a result of the study a model of a wheat plant was created suitable for the dry climate conditions in Sadovo, characterized by high grain yield.

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